Though newlyweds Zuckerberg, 28, and wife Priscilla Chan had been planning their nuptials for more than four months, the ceremony came as a shock to friends, who thought they were coming over for a surprise party in celebration of Chan’s UCSF medical school graduation.

The couple, who met while attending Harvard before Zuckerberg – who is now worth more than $19 billion – started Facebook, have been dating for nine years.